Electronics Forum | Thu Jun 22 10:27:26 EDT 2000 | Igmar
Can someone please help with the aperture size on a Micro BGA stencil. I want to have an electroformed stencil made with 0.1mm (4mil) thickness. The PCB pad for the micro BGA has a 0.406mm (16mil) diameter. What size should I make the apertures for t
Electronics Forum | Thu Jun 22 12:50:13 EDT 2000 | JAX
Igmar, Although I agree with Chrys that square is good,( Better volumn ) his explanation is not entirely correct. Heres a little insert from automata: With square apertures, solder paste is deposited at the center of the aperture. The center release
Electronics Forum | Mon Oct 21 23:48:13 EDT 2002 | harris
Hi: If anyone have the experience with the PCB pad design and stencil design for the uBGA? We meet the problem for it. The component data is 0.3mm diameter and 0.5 pitch. Could anyone tell me the PCB pad dimension, the stencil type and aperture dimes
Electronics Forum | Fri Jun 23 09:54:20 EDT 2000 | Dave F
Igmar: Chrys and JAX make good points. I'd like to add that you should be careful that you don't starve larger chip components of solder when using a 4 thou stencil.
Electronics Forum | Thu Sep 02 07:22:03 EDT 1999 | Earl Moon
| I'd like to know the advantages and disadvantages between the two. | | Thanks and regards, | | Both have their place. When using less fine pitch (.025" +) with fine pitch (.020" or less and BGA's) a .007" thick stencil may be used. This would re
Electronics Forum | Mon Nov 01 10:29:13 EDT 2010 | scottp
I've searched the archives and maybe my search skills aren't up to snuff but I couldn't find much. I'm curious what people are doing for 0.4 mm pitch BGAs, assuming a type 4 paste. Pad diameter? SMD or NSMD? Stencil thickness? Aperture diameter? Us
Electronics Forum | Thu Jun 22 11:21:59 EDT 2000 | Chrys Shea
My personal opinion: Use 20 mil squares with the corners radiused at 5 mils. The squares offer 2 benefits: 1) A little more paste, which makes for a higher diameter solder column that is more reliable 2) Better stencil release of the paste. It's e
Electronics Forum | Wed Aug 18 17:59:09 EDT 1999 | Mik Horvath
| | Hi, | | I'd like to ask some tips about the merits and shortcomings o | | of both screen printer and stencil printer. For small quantity and highly mixed usage, which type of printer is suitable to our | | application? | | The boards contain
Electronics Forum | Wed Aug 18 18:10:33 EDT 1999 | Mik Horvath
| | Hi, | | I'd like to ask some tips about the merits and shortcomings o | | of both screen printer and stencil printer. For small quantity and highly mixed usage, which type of printer is suitable to our | | application? | | The boards contain
Electronics Forum | Wed Aug 18 15:20:25 EDT 1999 | John Thorup
| Hi, | I'd like to ask some tips about the merits and shortcomings o | of both screen printer and stencil printer. For small quantity and highly mixed usage, which type of printer is suitable to our | application? | The boards contain no BGA and
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